Ponies were exported to neighboring countries, so a MIB pony in a German language package may not be a German nirvana pony. You have to check on the package where the pony is made, or somehow get a look at the pony's hooves.

Italian ponies are those made in Italy and stamped ITALY on their hooves. They were sold in Italy and other European countries, therefore the language on the packaging varies. Rare Italian ponies are the pink, blue, and yellow cotton candies made by Furga. These do not have ITALY on the hooves.

In India, only the first six collector ponies were sold. The ponies were made in India, and clearly marked as such. They were made through Playskool, so the hooves are marked Funskool rather than Hasbro.

Macau ponies were made in and marked Macau, they were not sold there. (Macau is in China, somewhat similar to Hong Kong.) Only the first six ponies and Lemon Drop were made. These ponies were mostly sold in Germany, and other European countries. Macau ponies are known for a few unique color combinations. Most notably Jenny,a brown and white version of Peachy. [6][7]

Mexican ponies were made and sold in Mexico. Initially the ponies were licensed to/made by a company called Lily Ledy, such ponies have clear hoof marks that say "Lily Ledy" and "Made in Mexico". This company made only the first six ponies, but then their factory burnt down and Hasbro then gave the license to a company called Auriken (who also made versions of the first six).

Lily Ledy versions of the first six are more rare than Auriken ones.

Auriken ponies have no marks on their hooves, their hooves are either completely flat or concave.

Because of the different factories the first six ponies made in Mexico are sometimes not even referred to as Mexican, but in reference to their production company. Ie "Lily Ledy Minty" or "Auriken FF Butterscotch" (aka "Mexican FF Butterscotch"), whereas later ones are just "Mexican Firefly". Any non- first six Mexican pony is also an Auriken pony, so calling it "Mexican" is enough.

The variations in printing, type of plastic used, and slight mold variations help identify the completely unmarked Auriken ponies. (Not to mention the place that you found that pony is a good hint, but with eBay these days a pony's true origin can be tricky.) [8]

Spanish ponies were made in, sold in, and marked Spain. Spanish ponies have been found in other countries, though if this due to sales in a store or people buying them on holidays is not clear. Many variations and types were made, one of the most famous and rare are the Spanish Piggy ponies.
The Piggy ponies are adult G1 ponies in a "piggy" pose and have blinking eyes like the US Beddy-Bye-Eyed baby ponies.